My husband has a large acoustic neuroma, has had it for 7 years. He had 3 surgeries & 6 weeks of radiation. the tumor is still there, but shrinking very slowly. This has caused balance problems and weakness in his left side. Do you think he would qualify for some disability benefits? How do we go about this? He had a construction company for 20 yrs, but is very limited in what he is able to do because of lack of balance or energy.